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SBS - Exchange Email error - rfc822

 
 
Dlogan
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      02-24-2011
Hi, Cound anyone please help with the error below. This is being sent
to client when emailing our address, however is seems to only happpen
randomly. I think the RFC error is something to do with exchange
5.5!!. I am using exchange 2003, this problem has only started in the
past few days.

Exchange MTA x400 is shown as not available in system manager.

Thanks
David.

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.






Final-Recipient: rfc822;
Action: failed
Status: 5.1.1
 
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Joe
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      02-24-2011
On Thu, 24 Feb 2011 06:02:36 -0800 (PST)
Dlogan <> wrote:

> Hi, Cound anyone please help with the error below. This is being sent
> to client when emailing our address, however is seems to only happpen
> randomly. I think the RFC error is something to do with exchange
> 5.5!!. I am using exchange 2003, this problem has only started in the
> past few days.
>
> Exchange MTA x400 is shown as not available in system manager.
>
> Thanks
> David.
>
> This is an automatically generated Delivery Status Notification.
>
> Delivery to the following recipients failed.
>
>
>
>
>
>
> Final-Recipient: rfc822;
> Action: failed
> Status: 5.1.1


'RFC822' does not in itself signify an error, it is the standard for
the format of SMTP email addresses, and I think it's being quoted here
to demonstrate that the address is a valid one under that protocol.
Certainly there's nothing wrong with the address shown.

You say 'this is being sent to client'. If the client is getting this
message, it's coming from their own mail server, not yours, and it is in
their SMTP logs that the answer will be found. The 'Action: failed' is
not exactly informative, and their detailed log should be more
forthcoming.

The important bit is 5.1.1, which means 'unknown user', and there are
many possible reasons for that. My own server will reject many kinds of
spam emails at the stage in proceedings where this error will be
produced, as it's the surest way to prevent continual re-trying. But
there are various other reasons for it.

Here's a list of common SMTP error codes, from a Microsoft point of
view, but the codes are common to all SMTP mail servers. Messages are
configurable, so the error message may not match these exactly:

http://support.microsoft.com/kb/284204

At the moment, we don't even know if their server contacted yours.
Given the extremely terse message, it might be telling the client it
can't find the entire domain: it may not have found a valid MX record
for your domain, for example. Are you receiving email directly, or
downloading by POP3?

And what is the reference to x400? It is an email system which is not
widely used today, if at all, though Exchange can still use it. You
don't need it running for normal Internet email. x400 email addresses
look like LDAP Distinguished Names, and nothing at all like SMTP
addresses.

--
Joe
 
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